Our school library ____________ from 8 a.m to 5:30 p.m., but the reading room _____________ only in the afternoon.
----- What color is your jacket? -----__________.
----- What’s this? ----- ____ a ruler.
----- What’s that in English? -----It’s ____ ID card.
--- How ____ you, Bill? -----I ____ fine, thanks!
Only then_______ his mistakes.